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MemoryModule x86x64 内存加载DLL
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发表于: 2022-3-29 18:31
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by devseed，此篇教程同时发在论坛和我的博客上，完整源码见我的github。
距离上次我写的SimpleDpack教程（为了理解加壳原理自己写的轻量级压缩壳），已经有一年多了。前几天修复x64的IAT载入序号问题，于是想着可以用这个原理自己重写一个解析PE和内存加载DLL的功能。虽然已有类似实现功能，如MemoryModule，但是这个项目还是有点复杂，模块间耦合度有些高，没法作为shellcode附加到EXE来引导DLL。
因此我决定重写一个低耦合，同时支持x86和x64，可以作为shellcode引导”附加到EXE区段上的DLL”的框架 。
本框架采取与windows加载DLL相似的名称来设计api，可以实现：
参考stb用XXX_IMPLEMENTATION宏控制代码实现，使得include单个头文件就能把模块功能全部引入的做法，有着单头文件结成非常容易实用的特点。于是我就用了一周多时间，自己写了个类似的低耦合单头文件winpe.h，用于解析与加载PE。为了便于shellcode引导，系统函数大多用函数指针传入参数，关键函数全部声明为inline。另外，我还用内联汇编写了从ldr中获取kernel32的基地址，从而减少对IAT硬编码的依赖。
libwinpe.c, 与libwinpe.def（引入def是因为stdcall编译后会被修改名称），把winpe.h的声明的导出函数编译为DLL，如下：
对于编写shellcode， 这里为了方便调试，采取用pyhton的keystone进行jit生成的机器码写入win_injectmemdll.c的全局变量里的做法， 如下：
详见win_injectmemdll_shellcodestub.py
参考https://bbs.pediy.com/thread-252260.htm， windows对于加载DLL调用如下：
a) 当调用LoadLibrary时首先打开文件并将按照PE文件格式解析数据，并以IMAGE方式将PE各段内容
逐块映射到内存中,如果需要并修复重定位：
kernel32!LoadlibraryA
->kernel32!LoadLibraryExA
->kernel32!LoadLibraryExW
->ntdll!LdrLoadDll
->ntdll!LdrpLoadDll
->ntdll!LdrpMapDll
->ntdll!LdrpCreateDllSection
->ntdll!NtOpenFile //打开目标文件*
->ntdll!NtCreateSection //创建映射*
->ntdll!NtMapViewOfSection //映射*
->LdrRelocateImageWithBias //修复重定位
b) 接着处理调入表等，然后调用TLS回调函数和DLLMAN入口函数；
kernel32!LoadlibraryA
->kernel32!LoadLibraryExA
->kernel32!LoadLibraryExW
->ntdll!LdrLoadDll
->ntdll!LdrpLoadDll
->ntdll!LdrpMapDll
->ntdll!LdrpWalkImportDescriptor //处理导入表等
->LdrpRunInitializeRoutines //调用DLLMAN
->LdrpCallTlsInitializers
->LdrpCallInitRoutine
总结为如下流程：
这里为了降低耦合，没有用系统的memset和memcpy，自己用inline实现的。
手动将以imagebase为基准的va重定向到目标imagebase的va。
用LoadLibraryA和GetProcAddress实现，考虑到shellcode，不能直接调用，应该通过传入函数指针调用。
另外还要考虑OFT中会出现用序号的情况，x86和x64判断表中不同，用sizeof(size_t)区分。
前三步都完成后可以来通过DllMain来引导了。
这部分我没有找到有TLS的DLL，所以没法进一步测试了。这部分代码直接借鉴的MemoryModule的相关函数。
首先需要修改exe的区段头，在后面增加一个区段。这里要特别注意区段的对齐，之后还要修正SizeOfImage。
这部分内容和winpe_memLoadLibrary函数实现的方式类似，只不过要用汇编来写shellcode，引导完成后跳转到原来exe的oep。 关键地址可以先留空，在注入时候填入对位置。对于相应的函数的shellcode，由win_injectmemdll_shellcodestub.py读取对应的libpe32.dll函数，填入对应的全局变量。下面代码以x86为例：
由于大部分都用的size_t或void*等与cpu字长相关的变量，大部分代码不用修改就能编译。
其余的差异部分，可以用sizeof(size_t)>4区分，或者_WIN64宏。如下所示
上面的代码我们可以获取kernel32的基址了，之后可以自己通过扫描export表来查找对应的导出函数了。
这里注意有个坑点，有的导出表项会forward到其他dll上，如kernel32!InitializeSListHead -> NTDLL!RtlInitializeSListHead，详见crashing-kernel32-initializeslisthead。通过DirRVA < FuncRVA < DirRVA + ExportSize来判断是否forward。
此处为了找到LoadLibraryA和GetProcAddress函数，不考虑forward情况，否则会引入递归问题。
本项目是我实现不加壳vfs（即通过hook nt函数将文件和文件夹等读取重定向到zip文件中）的衍生产物，采取的是尽量单头文件法和内联函数减小耦合，方便集成到代码中的做法。与其他的MemoryModule最大的区别是支持从shellcode引导DLL。由于以前我有了自己写压缩壳的经验，整体上处理起来还算是顺利。强迫症，感觉好多时间都花在了怎么统一化命名api和代码风格规范上了。至于实现内存加载Resource方面，暂时不考虑实现，汉化游戏一般也用不到这方面内容。
另外，这里还有个坑卡了我好长时间，就是x64的堆栈必须要0x10对齐（即调用函数时要sub rsp, 0x28预留空间与对齐），才能在movaps指令上不报错。之前一直不知道这条指令需要对齐，一直以为是少了哪些初始化，走偏了好久。特别感谢@YeLikERs指出了这一点，同时在PEB，LDR相关内容上帮助了很多。
经测试兼容性还算不错，windows xp, windows 7, windows 10, windows 11测试example文件都通过了，甚至我连linux上的wine也测试了（即用我汉化的游戏测试shellcode引导附加到exe区段上的DLL）。最后，附上几张测试图：
const char *dllpath = "test.dll";
size_t mempesize = 0;
void *memdll = NULL;
// load the pe file in memory and align it to memory align
void *mempe = winpe_memload_file(dllpath, &mempesize, TRUE);
// memory loadlibrary
memdll = winpe_memLoadLibrary(mempe);
winpe_memFreeLibrary(memdll);// memory loadlibrary at specific address
size_t targetaddr = sizeof(size_t) > 4 ? 0x140030000: 0x90000;
memdll = winpe_memLoadLibraryEx(mempe, targetaddr,
WINPE_LDFLAG_MEMALLOC, (PFN_LoadLibraryA)winpe_findloadlibrarya(),
(PFN_GetProcAddress)winpe_memGetProcAddress);
winpe_memFreeLibrary(memdll);free(mempe);const char *dllpath = "test.dll";
size_t mempesize = 0;
void *memdll = NULL;
// load the pe file in memory and align it to memory align
void *mempe = winpe_memload_file(dllpath, &mempesize, TRUE);
// memory loadlibrary
memdll = winpe_memLoadLibrary(mempe);
winpe_memFreeLibrary(memdll);// memory loadlibrary at specific address
size_t targetaddr = sizeof(size_t) > 4 ? 0x140030000: 0x90000;
memdll = winpe_memLoadLibraryEx(mempe, targetaddr,
WINPE_LDFLAG_MEMALLOC, (PFN_LoadLibraryA)winpe_findloadlibrarya(),
(PFN_GetProcAddress)winpe_memGetProcAddress);
winpe_memFreeLibrary(memdll);free(mempe);win_injectmemdll.exe exepath dllpath [outpath]win_injectmemdll.exe exepath dllpath [outpath]#define WINPE_SHARED#define WINPE_IMPLEMENTATION#include "winpe.h"#define WINPE_SHARED#define WINPE_IMPLEMENTATION#include "winpe.h"EXPORTS winpe_appendsecth
winpe_findgetprocaddress
winpe_findkernel32
winpe_findloadlibrarya
winpe_findspace
winpe_findmodulea
winpe_imagebaseval
winpe_imagesizeval
winpe_memFreeLibrary
winpe_memFreeLibraryEx
winpe_memGetProcAddress
winpe_memLoadLibrary
winpe_memLoadLibraryEx
winpe_membindiat
winpe_membindtls
winpe_memfindexp
winpe_memfindiat
winpe_memforwardexp
winpe_memload
winpe_memload_file
winpe_memreloc
winpe_noaslr
winpe_oepval
winpe_overlayload_file
winpe_overlayoffset
EXPORTS winpe_appendsecth
winpe_findgetprocaddress
winpe_findkernel32
winpe_findloadlibrarya
winpe_findspace
winpe_findmodulea
winpe_imagebaseval
winpe_imagesizeval
winpe_memFreeLibrary
winpe_memFreeLibraryEx
winpe_memGetProcAddress
winpe_memLoadLibrary
winpe_memLoadLibraryEx
winpe_membindiat
winpe_membindtls
winpe_memfindexp
winpe_memfindiat
winpe_memforwardexp
winpe_memload
winpe_memload_file
winpe_memreloc
winpe_noaslr
winpe_oepval
winpe_overlayload_file
winpe_overlayoffset
def inject_shellcodestubs(srcpath, libwinpepath, targetpath):
pedll = lief.parse(libwinpepath)
pedll_oph = pedll.optional_header
# generate oepint shellcode
if pedll_oph.magic == lief.PE.PE_TYPE.PE32_PLUS:
oepinit_code = gen_oepinit_code64()
pass
elif pedll_oph.magic == lief.PE.PE_TYPE.PE32:
oepinit_code = gen_oepinit_code32()
pass
else:
print("error invalid pe magic!", pedll_oph.magic)
return
# find necessary functions
FUNC_SIZE =0x400
codes = {"winpe_memreloc": 0,
"winpe_membindiat": 0,
"winpe_membindtls": 0,
"winpe_findloadlibrarya": 0,
"winpe_findgetprocaddress": 0}
for k in codes.keys():
func = next(filter(lambda e : e.name == k,
pedll.exported_functions))
codes[k] = pedll.get_content_from_virtual_address(
func.address, FUNC_SIZE)
codes['winpe_oepinit'] = oepinit_code
# write shellcode to c source file
with open(srcpath, "rb") as fp:
srctext = fp.read().decode('utf8')
for k, v in codes.items():
k = k.replace("winpe_", "")
_codetext = ",".join([hex(x) for x in v])
srctext = re.sub("g_" + k + r"_code(.+?)(\{0x90\})",
"g_" + k + r"_code\1{" + _codetext +"}", srctext)
with open(targetpath, "wb") as fp:
fp.write(srctext.encode('utf8'))
def inject_shellcodestubs(srcpath, libwinpepath, targetpath):
pedll = lief.parse(libwinpepath)
pedll_oph = pedll.optional_header
# generate oepint shellcode
if pedll_oph.magic == lief.PE.PE_TYPE.PE32_PLUS:
oepinit_code = gen_oepinit_code64()
pass
elif pedll_oph.magic == lief.PE.PE_TYPE.PE32:
oepinit_code = gen_oepinit_code32()
pass
else:
print("error invalid pe magic!", pedll_oph.magic)
return
# find necessary functions
FUNC_SIZE =0x400
codes = {"winpe_memreloc": 0,
"winpe_membindiat": 0,
"winpe_membindtls": 0,
"winpe_findloadlibrarya": 0,
"winpe_findgetprocaddress": 0}
for k in codes.keys():
func = next(filter(lambda e : e.name == k,
pedll.exported_functions))
codes[k] = pedll.get_content_from_virtual_address(
func.address, FUNC_SIZE)
codes['winpe_oepinit'] = oepinit_code
# write shellcode to c source file
with open(srcpath, "rb") as fp:
srctext = fp.read().decode('utf8')
for k, v in codes.items():
k = k.replace("winpe_", "")
_codetext = ",".join([hex(x) for x in v])
srctext = re.sub("g_" + k + r"_code(.+?)(\{0x90\})",
"g_" + k + r"_code\1{" + _codetext +"}", srctext)
with open(targetpath, "wb") as fp:
fp.write(srctext.encode('utf8'))
inline size_t STDCALL winpe_memload( const void *rawpe, size_t rawsize,
void *mempe, size_t memsize,
bool_t same_align)
{ // load rawpe to memalign
PIMAGE_DOS_HEADER pDosHeader = (PIMAGE_DOS_HEADER)rawpe;
PIMAGE_NT_HEADERS pNtHeader = (PIMAGE_NT_HEADERS)
((void*)rawpe + pDosHeader->e_lfanew);
PIMAGE_FILE_HEADER pFileHeader = &pNtHeader->FileHeader;
PIMAGE_OPTIONAL_HEADER pOptHeader = &pNtHeader->OptionalHeader;
PIMAGE_SECTION_HEADER pSectHeader = (PIMAGE_SECTION_HEADER)
((void *)pOptHeader + pFileHeader->SizeOfOptionalHeader);
WORD sectNum = pFileHeader->NumberOfSections;
size_t imagesize = pOptHeader->SizeOfImage;
if(!mempe) return imagesize;
else if(memsize!=0 && memsize<imagesize) return 0;
_inl_memset(mempe, 0, imagesize);
_inl_memcpy(mempe, rawpe, pOptHeader->SizeOfHeaders);
for(WORD i=0;i<sectNum;i++)
{
_inl_memcpy(mempe+pSectHeader[i].VirtualAddress,
rawpe+pSectHeader[i].PointerToRawData,
pSectHeader[i].SizeOfRawData);
}
// adjust all to mem align
if(same_align)
{
pDosHeader = (PIMAGE_DOS_HEADER)mempe;
pNtHeader = (PIMAGE_NT_HEADERS)((void*)mempe + pDosHeader->e_lfanew);
pFileHeader = &pNtHeader->FileHeader;
pOptHeader = &pNtHeader->OptionalHeader;
pSectHeader = (PIMAGE_SECTION_HEADER)
((void *)pOptHeader + pFileHeader->SizeOfOptionalHeader);
sectNum = pFileHeader->NumberOfSections;
pOptHeader->FileAlignment = pOptHeader->SectionAlignment;
for(WORD i=0;i<sectNum;i++)
{
pSectHeader[i].PointerToRawData = pSectHeader[i].VirtualAddress;
}
}
return imagesize;
}inline size_t STDCALL winpe_memload( const void *rawpe, size_t rawsize,
void *mempe, size_t memsize,
bool_t same_align)
{ // load rawpe to memalign
PIMAGE_DOS_HEADER pDosHeader = (PIMAGE_DOS_HEADER)rawpe;
PIMAGE_NT_HEADERS pNtHeader = (PIMAGE_NT_HEADERS)
((void*)rawpe + pDosHeader->e_lfanew);
PIMAGE_FILE_HEADER pFileHeader = &pNtHeader->FileHeader;
PIMAGE_OPTIONAL_HEADER pOptHeader = &pNtHeader->OptionalHeader;
PIMAGE_SECTION_HEADER pSectHeader = (PIMAGE_SECTION_HEADER)
((void *)pOptHeader + pFileHeader->SizeOfOptionalHeader);
WORD sectNum = pFileHeader->NumberOfSections;
size_t imagesize = pOptHeader->SizeOfImage;
if(!mempe) return imagesize;
else if(memsize!=0 && memsize<imagesize) return 0;
_inl_memset(mempe, 0, imagesize);
_inl_memcpy(mempe, rawpe, pOptHeader->SizeOfHeaders);
for(WORD i=0;i<sectNum;i++)
{
_inl_memcpy(mempe+pSectHeader[i].VirtualAddress,
rawpe+pSectHeader[i].PointerToRawData,
pSectHeader[i].SizeOfRawData);
}
// adjust all to mem align
if(same_align)
{
pDosHeader = (PIMAGE_DOS_HEADER)mempe;
pNtHeader = (PIMAGE_NT_HEADERS)((void*)mempe + pDosHeader->e_lfanew);
pFileHeader = &pNtHeader->FileHeader;
pOptHeader = &pNtHeader->OptionalHeader;
pSectHeader = (PIMAGE_SECTION_HEADER)
((void *)pOptHeader + pFileHeader->SizeOfOptionalHeader);
sectNum = pFileHeader->NumberOfSections;
pOptHeader->FileAlignment = pOptHeader->SectionAlignment;
for(WORD i=0;i<sectNum;i++)
{
pSectHeader[i].PointerToRawData = pSectHeader[i].VirtualAddress;
}
}
return imagesize;
}inline size_t STDCALL winpe_memreloc( void *mempe, size_t newimagebase)
{ PIMAGE_DOS_HEADER pDosHeader = (PIMAGE_DOS_HEADER)mempe;
PIMAGE_NT_HEADERS pNtHeader = (PIMAGE_NT_HEADERS)
((void*)mempe + pDosHeader->e_lfanew);
PIMAGE_FILE_HEADER pFileHeader = &pNtHeader->FileHeader;
PIMAGE_OPTIONAL_HEADER pOptHeader = &pNtHeader->OptionalHeader;
PIMAGE_DATA_DIRECTORY pDataDirectory = pOptHeader->DataDirectory;
PIMAGE_DATA_DIRECTORY pRelocEntry = &pDataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
DWORD reloc_count = 0;
DWORD reloc_offset = 0;
int64_t shift = (int64_t)newimagebase -
(int64_t)pOptHeader->ImageBase;
while (reloc_offset < pRelocEntry->Size)
{
PIMAGE_BASE_RELOCATION pBaseReloc = (PIMAGE_BASE_RELOCATION)
((void*)mempe + pRelocEntry->VirtualAddress + reloc_offset);
PRELOCOFFSET pRelocOffset = (PRELOCOFFSET)((void*)pBaseReloc
+ sizeof(IMAGE_BASE_RELOCATION));
// RELOCOFFSET block num
DWORD item_num = (pBaseReloc->SizeOfBlock -
sizeof(IMAGE_BASE_RELOCATION)) / sizeof(RELOCOFFSET);
for (size_t i = 0; i < item_num; i++)
{
if (!pRelocOffset[i].type &&
!pRelocOffset[i].offset) continue;
DWORD targetoffset = pBaseReloc->VirtualAddress +
pRelocOffset[i].offset;
size_t *paddr = (size_t *)((void*)mempe + targetoffset);
size_t relocaddr = (size_t)((int64_t)*paddr + shift);
*paddr = relocaddr;
}
reloc_offset += sizeof(IMAGE_BASE_RELOCATION) +
sizeof(RELOCOFFSET) * item_num;
reloc_count += item_num;
}
pOptHeader->ImageBase = newimagebase;
return reloc_count;
}inline size_t STDCALL winpe_memreloc( void *mempe, size_t newimagebase)
{ PIMAGE_DOS_HEADER pDosHeader = (PIMAGE_DOS_HEADER)mempe;
PIMAGE_NT_HEADERS pNtHeader = (PIMAGE_NT_HEADERS)
((void*)mempe + pDosHeader->e_lfanew);
PIMAGE_FILE_HEADER pFileHeader = &pNtHeader->FileHeader;
PIMAGE_OPTIONAL_HEADER pOptHeader = &pNtHeader->OptionalHeader;
PIMAGE_DATA_DIRECTORY pDataDirectory = pOptHeader->DataDirectory;
PIMAGE_DATA_DIRECTORY pRelocEntry = &pDataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
DWORD reloc_count = 0;
DWORD reloc_offset = 0;
int64_t shift = (int64_t)newimagebase -
(int64_t)pOptHeader->ImageBase;
while (reloc_offset < pRelocEntry->Size)
{
PIMAGE_BASE_RELOCATION pBaseReloc = (PIMAGE_BASE_RELOCATION)
((void*)mempe + pRelocEntry->VirtualAddress + reloc_offset);
PRELOCOFFSET pRelocOffset = (PRELOCOFFSET)((void*)pBaseReloc
+ sizeof(IMAGE_BASE_RELOCATION));
// RELOCOFFSET block num
DWORD item_num = (pBaseReloc->SizeOfBlock -
sizeof(IMAGE_BASE_RELOCATION)) / sizeof(RELOCOFFSET);
for (size_t i = 0; i < item_num; i++)
{
if (!pRelocOffset[i].type &&
!pRelocOffset[i].offset) continue;
DWORD targetoffset = pBaseReloc->VirtualAddress +
pRelocOffset[i].offset;
size_t *paddr = (size_t *)((void*)mempe + targetoffset);
size_t relocaddr = (size_t)((int64_t)*paddr + shift);
*paddr = relocaddr;
}
reloc_offset += sizeof(IMAGE_BASE_RELOCATION) +
sizeof(RELOCOFFSET) * item_num;
reloc_count += item_num;
}
pOptHeader->ImageBase = newimagebase;
return reloc_count;
}WINPEDEF WINPE_EXPORT inline size_t STDCALL winpe_membindiat(void *mempe,
PFN_LoadLibraryA pfnLoadLibraryA,
PFN_GetProcAddress pfnGetProcAddress)
{ PIMAGE_DOS_HEADER pDosHeader = (PIMAGE_DOS_HEADER)mempe;
PIMAGE_NT_HEADERS pNtHeader = (PIMAGE_NT_HEADERS)
((void*)mempe + pDosHeader->e_lfanew);
PIMAGE_FILE_HEADER pFileHeader = &pNtHeader->FileHeader;
PIMAGE_OPTIONAL_HEADER pOptHeader = &pNtHeader->OptionalHeader;
PIMAGE_DATA_DIRECTORY pDataDirectory = pOptHeader->DataDirectory;
PIMAGE_DATA_DIRECTORY pImpEntry = &pDataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT];
PIMAGE_IMPORT_DESCRIPTOR pImpDescriptor = (PIMAGE_IMPORT_DESCRIPTOR)(mempe + pImpEntry->VirtualAddress);
PIMAGE_THUNK_DATA pFtThunk = NULL;
PIMAGE_THUNK_DATA pOftThunk = NULL;
LPCSTR pDllName = NULL;
PIMAGE_IMPORT_BY_NAME pImpByName = NULL;
size_t funcva = 0;
char *funcname = NULL;
// origin GetProcAddress will crash at InitializeSListHead
if(!pfnLoadLibraryA) pfnLoadLibraryA =
(PFN_LoadLibraryA)winpe_findloadlibrarya();
if(!pfnGetProcAddress) pfnGetProcAddress =
(PFN_GetProcAddress)winpe_findgetprocaddress();
DWORD iat_count = 0;
for (; pImpDescriptor->Name; pImpDescriptor++)
{
pDllName = (LPCSTR)(mempe + pImpDescriptor->Name);
pFtThunk = (PIMAGE_THUNK_DATA)
(mempe + pImpDescriptor->FirstThunk);
pOftThunk = (PIMAGE_THUNK_DATA)
(mempe + pImpDescriptor->OriginalFirstThunk);
size_t dllbase = (size_t)pfnLoadLibraryA(pDllName);
if(!dllbase) return 0;
for (int j=0; pFtThunk[j].u1.Function
&& pOftThunk[j].u1.Function; j++)
{
size_t _addr = (size_t)(mempe + pOftThunk[j].u1.AddressOfData);
if(sizeof(size_t)>4) // x64
{
if((_addr>>63) == 1)
{
funcname = (char *)(_addr & 0xffff);
}
else
{
pImpByName=(PIMAGE_IMPORT_BY_NAME)_addr;
funcname = pImpByName->Name;
}
}
else
{
if(((size_t)pImpByName>>31) == 1)
{
funcname = (char *)(_addr & 0xffff);
}
else
{
pImpByName=(PIMAGE_IMPORT_BY_NAME)_addr;
funcname = pImpByName->Name;
}
}
funcva = (size_t)pfnGetProcAddress(
(HMODULE)dllbase, funcname);
if(!funcva) continue;
pFtThunk[j].u1.Function = funcva;
assert(funcva == (size_t)GetProcAddress(
(HMODULE)dllbase, funcname));
iat_count++;
}
}
return iat_count;
}WINPEDEF WINPE_EXPORT inline size_t STDCALL winpe_membindiat(void *mempe,
PFN_LoadLibraryA pfnLoadLibraryA,
PFN_GetProcAddress pfnGetProcAddress)
{ PIMAGE_DOS_HEADER pDosHeader = (PIMAGE_DOS_HEADER)mempe;
PIMAGE_NT_HEADERS pNtHeader = (PIMAGE_NT_HEADERS)
((void*)mempe + pDosHeader->e_lfanew);
PIMAGE_FILE_HEADER pFileHeader = &pNtHeader->FileHeader;
PIMAGE_OPTIONAL_HEADER pOptHeader = &pNtHeader->OptionalHeader;
PIMAGE_DATA_DIRECTORY pDataDirectory = pOptHeader->DataDirectory;
PIMAGE_DATA_DIRECTORY pImpEntry = &pDataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT];
PIMAGE_IMPORT_DESCRIPTOR pImpDescriptor = (PIMAGE_IMPORT_DESCRIPTOR)(mempe + pImpEntry->VirtualAddress);
PIMAGE_THUNK_DATA pFtThunk = NULL;
PIMAGE_THUNK_DATA pOftThunk = NULL;
LPCSTR pDllName = NULL;
PIMAGE_IMPORT_BY_NAME pImpByName = NULL;
size_t funcva = 0;
char *funcname = NULL;
// origin GetProcAddress will crash at InitializeSListHead
if(!pfnLoadLibraryA) pfnLoadLibraryA =
(PFN_LoadLibraryA)winpe_findloadlibrarya();
if(!pfnGetProcAddress) pfnGetProcAddress =
(PFN_GetProcAddress)winpe_findgetprocaddress();
DWORD iat_count = 0;
for (; pImpDescriptor->Name; pImpDescriptor++)
{
pDllName = (LPCSTR)(mempe + pImpDescriptor->Name);
pFtThunk = (PIMAGE_THUNK_DATA)
(mempe + pImpDescriptor->FirstThunk);
pOftThunk = (PIMAGE_THUNK_DATA)
(mempe + pImpDescriptor->OriginalFirstThunk);
size_t dllbase = (size_t)pfnLoadLibraryA(pDllName);
if(!dllbase) return 0;
for (int j=0; pFtThunk[j].u1.Function
&& pOftThunk[j].u1.Function; j++)
{
size_t _addr = (size_t)(mempe + pOftThunk[j].u1.AddressOfData);
if(sizeof(size_t)>4) // x64
{
if((_addr>>63) == 1)
{
funcname = (char *)(_addr & 0xffff);
}
else
{
pImpByName=(PIMAGE_IMPORT_BY_NAME)_addr;
funcname = pImpByName->Name;
}
}
else
{
if(((size_t)pImpByName>>31) == 1)
{
funcname = (char *)(_addr & 0xffff);
}
else
{
pImpByName=(PIMAGE_IMPORT_BY_NAME)_addr;
funcname = pImpByName->Name;
}
}
funcva = (size_t)pfnGetProcAddress(
(HMODULE)dllbase, funcname);
if(!funcva) continue;
pFtThunk[j].u1.Function = funcva;
assert(funcva == (size_t)GetProcAddress(
(HMODULE)dllbase, funcname));
iat_count++;
}
}
return iat_count;
}// initial memory module
if(!winpe_memreloc((void*)imagebase, imagebase))
return NULL;
if(!winpe_membindiat((void*)imagebase,
pfnLoadLibraryA, pfnGetProcAddress)) return NULL;
winpe_membindtls(mempe, DLL_PROCESS_ATTACH);PFN_DllMain pfnDllMain = (PFN_DllMain)
(imagebase + winpe_oepval((void*)imagebase, 0));
pfnDllMain((HINSTANCE)imagebase, DLL_PROCESS_ATTACH, NULL);return (void*)imagebase;
// initial memory module
if(!winpe_memreloc((void*)imagebase, imagebase))
return NULL;
if(!winpe_membindiat((void*)imagebase,
pfnLoadLibraryA, pfnGetProcAddress)) return NULL;
winpe_membindtls(mempe, DLL_PROCESS_ATTACH);PFN_DllMain pfnDllMain = (PFN_DllMain)
(imagebase + winpe_oepval((void*)imagebase, 0));
pfnDllMain((HINSTANCE)imagebase, DLL_PROCESS_ATTACH, NULL);return (void*)imagebase;
inline size_t STDCALL winpe_membindtls(void *mempe, DWORD resaon)
{ PIMAGE_DOS_HEADER pDosHeader = (PIMAGE_DOS_HEADER)mempe;
PIMAGE_NT_HEADERS pNtHeader = (PIMAGE_NT_HEADERS)
((void*)mempe + pDosHeader->e_lfanew);
PIMAGE_FILE_HEADER pFileHeader = &pNtHeader->FileHeader;
PIMAGE_OPTIONAL_HEADER pOptHeader = &pNtHeader->OptionalHeader;
PIMAGE_DATA_DIRECTORY pDataDirectory = pOptHeader->DataDirectory;
PIMAGE_DATA_DIRECTORY pTlsDirectory =
&pDataDirectory[IMAGE_DIRECTORY_ENTRY_TLS];
if(!pTlsDirectory->VirtualAddress) return 0;
size_t tls_count = 0;
PIMAGE_TLS_DIRECTORY pTlsEntry = (PIMAGE_TLS_DIRECTORY)
(mempe + pTlsDirectory->VirtualAddress);
PIMAGE_TLS_CALLBACK *tlscb= (PIMAGE_TLS_CALLBACK*)
pTlsEntry->AddressOfCallBacks;
if(tlscb)
{
while(*tlscb)
{
(*tlscb)(mempe, reason, NULL);
tlscb++;
tls_count++;
}
}
return tls_count;
}inline size_t STDCALL winpe_membindtls(void *mempe, DWORD resaon)
{ PIMAGE_DOS_HEADER pDosHeader = (PIMAGE_DOS_HEADER)mempe;
[注意]传递专业知识、拓宽行业人脉——看雪讲师团队等你加入！
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按帖子内容来看并没有，应该追求的基本就是能用就ok |
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seh异常处理我没试过，因为主要目标是为了汉化直接把dll付在exe附加段上，你可以试试seh有没有问题。 |
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我也不太清楚异常是不是需要特殊处理。就我自己的测试，64位yuzu模拟器的exe，把dll附加到exe程序里测试通过。 |
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异常是需要额外处理的，不过相比之下，资源的处理才是最麻烦的 |
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博主优秀啊
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那个py不太会用 没环境
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py只是为了方便生成shellcode，只是内存加载dll，其实只用winpe.h就行了。 |
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是的，我一开始也想改github上的MemoryModule，但是发现他里面好多直接用系统api调用的，想改成shellcode引导不太方便。 |
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说到降低耦合，嘿嘿，我可有精神了 只需要继承CMappingPe类，并覆盖protect里的几个虚函数，即可在r3 or r0使用。不过跨进程不会选在R3。 话说R0 怎么处理seh啊。
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一般来说内核态很少用c++开发吧？ 用c++有个麻烦事，动态LoadLibrary的符号问题不好解决。seh我也想知道怎么处理的，没有遇到过对应的样本。 |
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我开发是用clang编译的，还没试过msvc，是不是msvc不支持void*指针相加？ |
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这简单，同样内存加载一份，计算rva，然后取模块地址。我说的是顺便r0加载驱动。 
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支持吧 |
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